Shaft-bearing.



A. M, MATTIOE. SHAFT BEARING.

APPLICATION FILED APR. 14, 1904.

1,028,122. Patented June 4, 1912.

WITNESSES: INVENTOR @410 6 5 M BY 7 ATTI'JRNEY cuLumnA PLANDGRAPH c0..WASHINGTON. n ::v

Patented June 4, 1912.

2 SHEETS-SHEET 2.

' ATfdRNEYS A. M MATTIGE.

SHAFT BEARING. APPLICATION rum) APR. 14, 190

COLUMBIA PLANOukAPn c0-. WASHINGTON n L WITNESSES:

ASA M. MATTICE, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR. TO WESTINGHOUSEELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

SHAFT-BEARING.

Specification of Letters Patent.

Patented June t, 1912.

Application filed April 14, 1904. Serial No. 203,223.

To all whom it may concern Be it known that I, As; M. MATTIon, a citizenof the United States, and a resident of Pittsburgh, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Shaft- Bearings, of which the following is aspecification.

My invention relates to shaft or axle bearings, and particularly tobearings for" the armature shafts of electric motors which are employedfor the propulsion of railway vehicles and for similar purposes.

My invention has for its object to provide a bearing of simpleconstruction, which affords convenient and etlicient means for.

lubrication and which may be firmly secured in position in the fieldmagnet frame of a motor.

Among the various types of bearings for the armature shafts of electricrailway motors, is one having a collar of bearing metal inclosed in ahousing which is pro vided with a chamber or chambers containing a.lubricant and absorbent material so disposed as to make contact withexposed portions of the shaft. These housings have usually been secured'in position between the two halves of the field magnet frame of themotor by means of annular rings which were seated in correspondinggrooves in the field magnet frame, dowel pins being provided to preventrotation of the housings. Such a construct-ion is defective, for thereason that the bearing housings become loose if they are not properlyfitted to the field magnet frame or if the two halves of the frame arenot firmly bolted together. The bearings and housings heretofore devisedhave also been complicated and not readily accessible.

A bearing housing constructed in accordance with my invention does notdepend upon the clamping together of the two halves of the field magnetframe in order to secure it in position, since it is bolted to one halfof the frame, while its construction is such as to provide a simple andreadily accessible bearing.

In the accompanying drawings, Figure 1 is a view, in end elevation, ofan electric motor embodying and illustrating my invention; Fig. 2 is asectional view of the axle bearing housing, the section being taken online II-II of Fig. 1, and Fig. 3

annular is a view, in section, on line IIIIII of Fig. 2.

Referring now to the drawings, axle bearing housing 1 comprises twoapproximately cylindrical and concentric shells 2 and 3, between whichare formed three chambers 4:, 5 and 6. Pressed into the innercylindrical shell 2 and secured therein by means of a set-screw 7, is acollar 8 having an inner facing 9 of any suitable bearing metal. In oneside of the cylindrical shell 2, the collar 8 and the facing 9, is anopening 10 which exposes a corresponding portion of shaft 11.Communication with the exterior is provided for the chamber 4L by meansof a vertical extension 12, the upper end of which may be ordinarilyclosed by means of a cover 13. The extension 12 constitutes a hand-holethrough which cotton or wool waste .14 or any other suitable absorbentmaterial may be introduced into the chamber 4 and subsequently saturatedwith any suitable liquid lubricant, the lubricant being applied to theshaft by the waste which is in contact therewith.

That portion of the chamber 4 which extends beneath the shaft 11 will,of course, retain any excess of lubricating liquid over what is retainedby the body of waste and the latter will raise such liquid, by capillaryattraction, as may be needed for lubricating the shaft. Inasmuch as theextension 12 and the major portion of the chamber t constitute asubstantially vertical receptacle into one side of which the exposedportion of the shaft projects, normal use of the motor which tends topack the waste more closely and densely within the chamber will alsotend to maintain it in close contact with the exposed surface of theshaft. This function is important and valuable and, so far. as I know,has not pertained to the de vices of this general character which havebeen heretofore employed.

The chamber 5 is not utilized for any particular purpose, except thatthe setscrew .7 is located therein, communication from the exterior tothe set-screw being afforded by a wrench-hole 15. The chamber 6 and apipe 6 are provided for the purpose of collecting and draining off thewaste oil which oozes out of the bearing and would ordinarily collect inthe motor frame if such means were not provided for its removal.

On the outer surface of the shell 3, are

two accurately finished cylindrical surfaces 16 and 17, the former ofwhich engages with a corresponding surface 18 on the field magnet frame19, and the latter of which is engaged by a corresponding surface 21 inthe lower half 20 of the field magnet frame. A recess 22 is alsoprovided in the lower half of the field magnet frame 20, into which fitsa corresponding segmental portion 23 that serves to prevent movement ofthe bearing housing longitudinally of the shaft. Cast integral with theouter shell 3 of the bearing housing, are lugs 24, which constitutemeans for fastening the housing to the lower half 20 of the field magnetframe, clearance being provided between the lower surfaces of the lugsand the flanges 25 on the lower half 20 of the field magnet frame, sothat the housing may be securely bolted in position regardless ofwhether it exactly fits the lower portion of the field magnet frame.

A handle 26 is cast integral with the outer, cylindrical shell 3 andconstitutes means for handling the housing or for lifting the armatureand its two bearings outof the field magnet frame. After the armatureshaft has once been worn to its bearings, it is generally desirable andadvantageous to retain the hearings in proper position with reference tothe ends of the shaft, and in replacing an armature, to also replace thebearings and housings which are fitted to that armature.

From the description and drawings, it will be understood that anextremely simple shaft bearing has been provided, which affordseflicient means for lubrication and which is easily accessible and thatthe housing is securely bolted in position without being dependent uponan accurate and rigid connection of the parts of the field magnet frame.

I claim as my invention:

1. A shaft bearing comprising a collar surrounding the shaft and havingan opening in one side which exposes arelatively large portion of theshaft, and a one-piece housing comprising concentric shells ofmaterially different diameters, the inner shell being provided with aside opening and with means for locking the collar in position toregister said openings and the outer shell having a chamber whichcontains a lubricant and means for applying the lubricant to the shaftthrough said openings.

2. A shaft bearing comprising a collar surrounding the shaft and havingan opening in one side which exposes the shaft and a housing comprisingapproximately concentric, cylindrical shells, the inner one beingprovided with a side opening and with means for securing the said collarin position to register said openings and the outer one havingcylindrical surfaces and lugs for securing the housing in position.

3. A shaft bearing comprising a collar surrounding the shaft and havingan opening in one side which exposes the shaft and a housing comprisingapproximately concentric, cylindrical shells, the inner one beingprovided with a sideopening and with means for securing the said collarin position to register said openings and the outer one havingcylindrical surfaces and lugs for securin the housin in osition. and ation to register said openings and the outer one having cylindricalsurfaces and lugs for securing the housing in position, a chamberpartially surrounding the inner shell and communicating with the saidopening in the collar and having a hand-hole at the top, and a secondchamber provided to collect waste lubricant.

5. In an electric motor, the combination with a field magnet frame intwo portions, of shaft-bearing housings each having two cylindricalsurfaces which are engaged by corresponding surfaces in the lowerportion of the field magnet frame and lugs integral with the housing forsecuring it to that portion, only one of the said cylindrical surfaceson each housing being engaged by the corresponding surfaces in the upperportion of the field magnet frame.

In testimony whereof, I have hereunto subscribed my name this28th clayof March, 1904:. a

ASA M. MATTICE.

itnesses WVEsLEY G. CARR,

BIRNEY HINns.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

